DNA Paternity Testing From DNA Diagnostics Center. DDC is one of the largest DNA testing companies in the world. Founded in 1995, DDC offers comprehensive DNA testing services for paternity and other family relationships. DDC performs over 600,000 DNA tests annually.
Here are some examples of heat energy. 1  The biggest example of heat energy in our solar system is the sun itself. 2  The sun radiates heat to warm us up one the planet earth. 3  When the burner of a stovetop is very hot, it is a source of heat energy.
Sources of Heat. Scientists believe the earthâs core get its heat from three sources: leftover heat from the planetâs formation, friction and pressure from the outer layers, and energy from radioactive minerals. During the earthâs first 500 million years, the entire planet was a molten blob of matter.Although the exterior has cooled over the billions of years that followed, its inside remains hot. Heat from uranium, thorium and other radioactive elements also keep the temperature high.uring the earthâs first 500 million years, the entire planet was a molten blob of matter. Although the exterior has cooled over the billions of years that followed, its inside remains hot. Heat from uranium, thorium and other radioactive elements also keep the temperature high.